N/A - USN-3548-1

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.10

Summary:

The system could be made to crash or run programs as an administrator.

Software Description: - linux: Linux kernel

Details:

Jay Vosburgh discovered a logic error in the x86-64 syscall entry implementation in the Linux kernel, introduced as part of the mitigations for the Spectre vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 17.10:
linux-image-4.13.0-32-generic 4.13.0-32.35
linux-image-4.13.0-32-lowlatency 4.13.0-32.35
linux-image-generic 4.13.0.32.34
linux-image-lowlatency 4.13.0.32.34

After a standard system update you need to reboot your computer to make all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.

References:
https://www.ubuntu.com/usn/usn-3548-1
https://launchpad.net/bugs/1745564

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.13.0-32.35